The Mysterious One (Car 2). A quick-witted intellectual known as the 'Human Computer.' Possesses vast knowledge and supports the group's MCing and talk segments. A bundle of talent who also handles costume production for the members.

The Skinny One (Car 3). A reliable leader who gently pushes others forward (self-proclaimed introvert). Loves anime and games. Usually plays the comic relief, but is a spiritual pillar who can be relied upon in times of need.

The Muscular One (Car 4). A tsundere, but deep down a man of justice with more chivalry than anyone. His emotions show easily and he has a tearful side. He cares deeply for his comrades and provides great support for new members. (Sweet: 6, Salty: 4)

The Clumsy One (Car 5). A genius at dancing, but usually a scatterbrained klutz. A passionate creator who serves as the general director for live shows. His frequency of slips of the tongue and forgetting things is legendary.

The Youngest One (Car 7). Pure, kind, and always giving his all; the group's healing presence. The 'mother' figure of Bullet Train who supported the vocals alone for years. Always humble toward everyone, a saint who rarely gets angry. (Speaks in a Kansai drawl as he is from Kansai.)

The Flashy One (Car 11). Bright and social, acting as a bridge between the original and new members. Has a stoic passion for singing more than anyone else. Loves to talk and constantly keeps the energy up in the dressing room.

The Foodie (Car 12). Serious and hardworking, with a love for comedy and an approachable personality. A calm voice of reason who observes his surroundings well. The type who acts rather than speaks, never compromising on his practice routine.

The Straightforward One (Car 13). Possesses a direct and passionate heart (actually gets lonely easily). An honest, beloved character whose emotions are clear to see. Has a younger-brother temperament, loving his seniors and being great at getting close to them.

The Kaiju (Car 14). The youngest, yet fearless and gives his all to everything, including play. Despite being the youngest, he has the guts to tease his older brothers. A bundle of professionalism who knows exactly how to present himself.